Astrophysical: Galaxies

  • Publication
    Planetary nebula candidates in a southern region of M33
    In a search for emission line objects made in a southern region of M 33 using narrow band filters centered on [O III], Hα and adjacent continua, we detect some...
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    Planetary nebulae as tracers of galaxy stellar populations
    We address the general problem of the luminosity-specific planetary nebula (PN) number, better known as the `α' ratio, given by α=NPN/Lgal, and its relationship...
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    Planetary nebulae in the dwarf galaxy NGC 6822: Detection of new candidates
    We have discovered 13 new candidate Planetary Nebulae (PNe) in the dwarf irregular galaxy NGC 6822, increasing its total number to 17 objects. Our sample of...
  • Publication
    Planetary nebulae: the universal mass-metallicity relation for Local Group dwarf galaxies and the chemistry of NGC 205
    Here we study 16 planetary nebulae (PNe) in the dwarf irregular galaxy NGC 205 by using Gemini Multi-Object Spectrographs (GMOS@Gemini) spectra to derive their...
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    Pleiades low-mass brown dwarfs: the cluster L dwarf sequence
    Aims.We present a search for low-mass brown dwarfs in the Pleiades open cluster. The identification of Pleiades members fainter and cooler than those currently...
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    PMAS optical integral field spectroscopy of luminous infrared galaxies. II. Spatially resolved stellar populations and excitation conditions
    Context. The general properties (e.g., activity class, star formation rates, metallicities, extinctions, average ages, etc.) of luminous (LIRGs) and...
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    Polar bulges and polar nuclear discs: the case of NGC 4698
    The early-type spiral NGC 4698 is known to host a nuclear disc of gas and stars which is rotating perpendicularly with respect to the galaxy main disc. In...
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    Polarimetric observations of a sample of Compact Steep-Spectrum sources
    Measurements of the polarised emission from Compact Steep-Spectrum (CSS) sources can give important information about the physical conditions inside and around...
  • Publication
    Polarimetry of the transient relativistic jet of GRB 110328/Swift J164449.3+573451
    We present deep infrared (Ks-band) imaging polarimetry and radio (1.4- and 4.8-GHz) polarimetry of the enigmatic transient Swift J164449.3+573451. This source...